Sp 2013 WFE workflow hell.

I am back fellow readers. Back with a vengeance.
Currently, I am in possession of one BIG SharePoint 2013 farm with a total of 24 server between prod, sys and dev.
The production farm is a 9 SP farm behemoth.
So it began with a simple enough requirement, please demo SharePoint 2013 workflows. I said OK and tried to create one.
Nope.
Tried another site.
Nope.
Spent 6 hours on the phone with Premier.
Nope.
Slept on it and guess what occurred to me. I should check all WFE to see if they have workflow manager CLIENT installed.
They didn’t.
Now they do.
Tried workflows again.
YUP. They work.
So WFE workflow hell, i see you now.
Enjoy my fail.
Yours truly,
Nando